Jet Grouting

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The jet grouting method is a specialist technique for underpinning, reinforcing or deepening building foundations, for sealing or stiffening blankets and for dam sealing. To produce jet grouting bodies a drill rod is drilled into the ground. When the specified depth is reached, an energy-rich liquid – water or water-binder slurry – is jetted through a nozzle at the bottom end of the rod. Simultaneous extraction and rotation of the drill rod causes the liquid jet to erode the soil. A portion of the soil is flushed out with the liquid. With the binder slurry remaining in the soil, a cylindrical plastic concrete body is produced.